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Long-tailed Woodnymph Thalurania watertonii

IUCN Red List Criteria

Critically Endangered  
Endangered B2ab(ii,iii,v); C2a(i) 
Vulnerable B2ab(ii,iii,v); C2a(i) 

IUCN Red List history

Year Category
2015 Endangered
2012 Near Threatened
2008 Near Threatened
2004 Near Threatened
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern

Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type continent
Average mass -


  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 34,800 medium
Area of Occupancy breeding/resident (km2) 499
Number of locations -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 1000-2499 unknown Estimated 2014
Population trend Decreasing Inferred -
Number of subpopulations - - -
Largest subpopulation - - -
Generation length (yrs) 4.2 - - -
Population justification: The global population is estimated at less than 2,500 individuals, with no more than 250 individuals in each subpopulation (ICMBio 2014).
Trend justification: The population is suspected to be declining owing to widespread deforestation which is thought to be severe in some areas, although it is noted that the species will accept altered habitats as long as forest patches or stands of trees remain.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Brazil Native Extant       Yes

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Brazil Brejo dos Cavalos site factsheet
Brazil Chapada do Araripe site factsheet
Brazil Complexo Gurjaú site factsheet
Brazil Engenho Coimbra (Usina Serra Grande) site factsheet
Brazil Guadalupe site factsheet
Brazil Igarassu site factsheet
Brazil Mata do Estado site factsheet
Brazil Murici site factsheet
Brazil Reserva Biológica de Pedra Talhada site factsheet
Brazil Serra de Itabaiana e Matas de Areia Branca site factsheet
Brazil Serra do Mascarenhas site factsheet
Brazil Serra do Urubu site factsheet
Brazil Usina Cachoeira site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations Suitable resident
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest Suitable resident
Artificial/Terrestrial Urban Areas Suitable resident
Forest Subtropical/Tropical Moist Lowland Major resident
Savanna Dry Major resident
Altitude 0 - 700 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Agro-industry farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching / Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Ecosystem degradation
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Ecosystem degradation, Ecosystem conversion


Purpose Primary form used Life stage used Source Scale Level Timing
Pets Whole Adults and juveniles Wild International Non-trivial Recent
Pets/display animals, horticulture - - - International

Recommended citation
BirdLife International (2015) Species factsheet: Thalurania watertonii. Downloaded from on 28/11/2015. Recommended citation for factsheets for more than one species: BirdLife International (2015) IUCN Red List for birds. Downloaded from on 28/11/2015.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Endangered
Family Trochilidae (Hummingbirds)
Species name author (Bourcier, 1847)
Population size 1000-2499 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 34,800 km2
Country endemic? Yes
Links to further information
- Summary information on this species